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A appointmentIn astronautics, it is a maneuver that leads two or more space vehicles to approach each other.
The appointment can be the prelude to a simple visual recognition of the vehicles involved, or a mooring (docking); In the latter case, space vehicles must be driven slowly until they have an almost zero relative speed.
An appointment mission may be necessary when one wishes to carry out the exploration from very close to a celestial body, for example, a comet, by a space probe. In this case the American technicians differentiate the "rendez vous" or flight of the probe that approaches the celestial body and follows it during a certain period maintaining its same speed and direction of travel, of the "flyby" or fast passage next to the celestial body with a different speed and direction.
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